Online PHP editor | output for QVs59

<?php abstract class MakeMeCMS_Addon_Abstract { static protected $_ver = 0.1; static protected $_list = []; static protected function add($addon) { self::$_list += [$addon=>$addon]; } static protected function check($addon) { if(isset($_list[$addon]) && class_exists($_list[$addon].'_Master') && method_exists($_list[$addon].'_Master', Main())): return true; else: return false; endif; } } class MakeMeCMS_Addon_Override extends MakeMeCMS_Addon_Abstract { public function get($what) { if(isset(parent::$what)): return parent::$what; endif; } } class MakeMeCMS_Addon_Call { static private $_state = false; static public function set($arg) { $this->_state = $arg; } static public function state() { return $this->_state; } } class myAddon_Master extends MakeMeCMS_Addon_Abstract { static public $callable_from_templates = true; static public function Main(MakeMeCMS_Addon_Call $call) { parent::add('myAddon'); $call->set(true); return $call; } static public function hello() { echo('Hello World!'); } } $sysCall = new MakeMeCMS_Addon_Call; myAddon_Master::Main($sysCall); if(null !== MakeMeCMS_Addon_Override::get($_list['myAddon'])): myAddon::hello(); endif;